[services-systemd] Add a schema file for the configuration

src/modules/services-systemd/services-systemd.schema.yaml

@@ -0,0 +1,25 @@
+# SPDX-FileCopyrightText: 2020 Adriaan de Groot <groot@kde.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+---
+$schema: https://json-schema.org/schema#
+$id: https://calamares.io/schemas/services-systemd
+definitions:
+    service:
+        $id: '#definitions/service'
+        type: object
+        description: a name and a flag for services, targets, and others
+        additionalProperties: false
+        properties:
+            name: { type: string }
+            mandatory: { type: boolean, default: false }
+        required: [ name ]
+
+additionalProperties: false
+type: object
+properties:
+    services: { type: array, items: { $ref: '#definitions/service' } }
+    targets: { type: array, items: { $ref: '#definitions/service' } }
+    timers: { type: array, items: { $ref: '#definitions/service' } }
+    disable: { type: array, items: { $ref: '#definitions/service' } }
+    disable-targets: { type: array, items: { $ref: '#definitions/service' } }
+    mask: { type: array, items: { $ref: '#definitions/service' } }